Dry shaver



May 6, 1941. J. H. RAND, JR i 2,240,953

DRY SHAVER i Filed ay 28, 1938 24 FIGA INveNroR J.H.RAND,JR.

Patented May 6, 1.941

DRY SHAVER Y James Henry Rand, Jr., Stamford, Conn., assignor, by mesneassignments, to Remington Rand Inc., Buffalo, N. Y., a corporation ofDelaware Application May 28, 1938, Serial No..210,684

Claims.

This invention relates to improvements in the shearing head for razorsof the dry shaver type, and more particularly to the construction of thecutting members therefor,

The shearing head of the invention is used with a razor similar to thatdisclosed and described in the patent application of H. Landsiedel, S.N. 123,162, led January 30, 1937, patented October 25, 1938, and No.2,134,134.

Most of the razors now in use are ineffective for use in cutting longhair. This is due to the fact that no adequate combing device isprovided for collecting the air into contact With the shearing edge.

It is, therefore, the principal object of this invention to provide ashearing head in which adequate combing facilities are provided forcombing long hair into the cutter.

Another object is to provide a shearing head having two separate anddistinct areas, one for shaving, and the other for cutting long hair.

A more clear conception of the construction, operation, and'furtherobjects of the invention may be had from the following specificationwhen read in conjunction with the accompanying drawing, lin which Fig. 1is a side elevation of the upper portion of a. dry shaver, having partsthereof broken away to show the operating mechanism of the inner cutter;

Fig. 2 is an enlarged cross section of Fig. 1 taken along line 2--2thereof;

Fig. 3 is a cross section through 3-3 of Fig. 2;

Fig. 4 is a cross section through 4-4 of Fig. 2;

Fig. 5 is a plan View of the outer cutter;

Fig. 6 is a side elevation of the inner cutter;

Fig. 7 is a schematic showing of a hair in position to be cut.

Figs. 1 and 2 disclose a casing or handle Il) similar to that describedin the above patent application. Through openings II and I2 in casingI0, extend resilient plungers I3 and rock lever Il, respectively.Removably affixed to the casing I0 by a set screw I5 is the shearinghead I6, which comprises a fixed outer cutter I1 and an inner cutter I8.Openings I9 and 20 in the base of the shearing head I6 correspond withthe openings I I and I2 in casing I0, and are provided for plungers I3and rock lever I4, respectively. The rock lever I4 is oscillated by anywell known type of motor (not shown).

The outer cutter member Il has a curved shaving section forming theouter portion thereof.

A central circular bore is formed in the outer t cutter as shown in Fig.2. The outer surface of outer cutter Il has its upper arcuate surfaceground away in the center to form three flat surfaces 2I, 22, and 23,disposed at obtuse angles to each other. The metal at the edges of thecutter is left to form ribs or ridges 24, which are adapted to protectthe razor and to form ameans for stretching the skin when the cutter isapplied to the face. Slots 25 are cut through the flat surfaces 22 and23 into the central bore, said slots extending from the surface 2| downthe side of the cutter. These slots leave a plurality of comb orcutterbars, the inner edges of which constitute shearing edges. The metalremaining under the surface 2I forms a web or longitudinal bar, whichtends to strengthen and maintain the cutter rigid. This web orlongitudinal bar is located at one side of the medial plane of thecutter.

Cut in the bars in face 23 is a longitudinal slot 26 which extends intothe bore at an angle as shown in Fig. 2. This slot divides the bars intotwo separate sets, the upper set forming a comb with blunt cutting.teeth 21.

The inner cutter I8 is substantially cylindrical in form, and has aneccentric bore. Cut in the portion of the cutter having the thickestwall is a slot 2B, which is adapted to be engaged by the lever I4. Cutin and extending through the wall diametrically opposite to slot 28 is aplurality of transverse slots 29 leaving a plurality of cutter bars 28',the edges of which constitute shearing members. The inner cutter memberis formed with longitudinally extending channels 28" at opposite ends ofcutter bars 29' to form shoulders 29 at opposite ends of cutter bars29', to relieve the friction between the inner andouter cutters, and toinsure that the shearing edges will be in close engagement with theinner sur.- face of the outer cutter. It will be noted that channels 29on the side adjacent the slot 26 are arranged so that the shoulders atthe ends of cutter bars 29 are intermediate the ends of the blunt teethZLthereby obviating the possibility of cutting the skin which might bedrawn in by the comb.

The side of the shaver head provided with the fiat surface 23 is formedwith a plurality of complemental bars 29b at the outer side of theshaving section by the slotting operationthat providesslots 25. Bars 29project upwardly and toward the ends of blunt cutting teeth 21 butterminate in spaced relation relative thereto in order to form slot 2i.The formation of longitudinal channels 28" in inner cutter member Il atopposite ends'of cutter bars 29 provides :iiat

faces 23e. 'I'hese flat faces 29 are on the outer face of inner cutteri8 and extend from the bottom portions of shoulders 29* in the mannerillustrated in Fig. 2 to provide a space between the inner and outercutters under the portion of the shaving section at the outer ends ofthe blunt 1 the lever I4, thereby moving theshearing edges of thel innercutter across the edges of the outer cutter. 1f the surface 22 isbrought into engagement with and moved over the face in a directionparallel to the slots 25. short hair will be combed into the slots and29, and sheared off by the action of the cutters.

If it is de'sired to cut long hair, the surface 23 is brought intoengagement with the skin, and the hair is combed by the teeth 21 intothe position shown inFig. 7. As will be seen, the hair lies in the slot2 5 and is looped into the slot 2l. .As the inner cutter oscillates thenext adjacent shear edge cuts the hair.

While I have described what I consider to be a highly desirableembodiment of my invention, it is obvious that many changes in formcould be made without departing from the spirit of my invention, and I,therefore, do not limit myself to the exact form herein shown anddescribed,

nor to anything less than the whole of my invention as hereinbefore setforth, and as hereinafter claimed.

What I claim as new, and desire to secure by Letters Patent, is: f

1. A dry shaving head comprising an outer cutter member having a curvedshaving section, said section having U-shaped ribs at opposite ends, alongitudinal bar joining the central portions of saidribs, a pluralityof spaced parallel cutter bars having opposite ends integral with saidlongitudinal bar and one side of said section, a plurality of bluntcutting teeth projecting laterally'in spaced parallel relation from theopposite side of said longitudinal bar, complemental bars on the otherside of said section projecting in aligned relation toward the ends ofsaid teeth and terminating in spaced relation to said teeth, the outersurface of the first-mentioned bars lying in a plane in substantiallyperpendicular relation to the plane of the outer surfaces of said bluntteeth and complemental bars, each of said planes being in inclinedrelation to the sides of said cutter member, said bars and teeth havingcontinuous partially cylindrical inner surfaces defining a bore in saidcutter member, and an inner cutter member having a plurality of spacedparallel cutter bars formed with a partially cylindrical outer surfacecomplementary to the partially cylindrical inner surface of the bars andteeth of said outer cutter member for cutting cooperation between saidbars during the reciprocation of one of said cutter members relativetothe other, said cutter bars of said inner cutter member having oppositeends terminating intermediate the ends ofsaid first-mentioned cutterbars and said teeth, respectively, said inner cutter member being formedto provide shoulders at the ends of the cutter bars thereon insubstantially Vperpendicular relation to said teeth and firstmentionedcutter bars and said inner cutter member having longitudinally extendingchannels on each side thereof under the outer ends of saidfirst-mentioned cutter bars and said complemental bars: and adjacent tosaid shoulders.

2. A dry shaving head comprising an outer cutter member having a curvedshaving section, a longitudinal bar forming the central portion of saidsection, a plurality of spaced parallel cutter bars having opposite endsintegral with said longitudinal bar and one side of said section, aplurality of blunt cutting teeth projecting laterally in spaced parallelrelation from the opposite side of said longitudinal bar, the other sideof said section being formed to provide an opening at the ends of saidteeth, said cutter bars having flat outer surfaces lying in the sameplane, said blunt teeth having fiat outer surfaces li'lns` in a commonplane substantially perpendicular to the plane of said cutter bars, saidteeth, longitudinal bar and cutter bars having an inner surface forminga partially cylindrical longitudinal bore in said outer cutter member,and an inner cutter member formed to provide a partially cylindricalsection having bearing engagement with the partially cylindrical innersurface of said outer cutter member under said longitudinal bar and theadjacent portions of said first-men.. tioned cutter bars and said teethbut terminating inwardly of the ends of said teeth and intermediate theends of said first-mentioned bars, and said inner cutter member beingformed to pro- 'vide longitudinally extending channels under the outerends of said teeth and first-mentioned bars at the ends of the cutterbars thereon.

3. A dry shaving head comprising anv outer cutter member having a curvedshaving section, a longitudinal bar forming the central portion of saidsection, a plurality of blunt cutting teeth projecting laterally inspaced parallel relation from one side of said longitudinal bar towardone side of said section, a plurality of complemental bars on said oneside of said section projecting in spaced parallel relation toward saidblunt teeth in aligned relation therewith and terminating in spacedrelation relative thereto, said cutter member being formed with alongitudinal bore providing partially cylindrical surfaces at the inneredges of said bars and teeth, and an inner cutter member having aplurality of spaced parallel cut. ter bars formed with a partiallycylindrical outer surface complementary to the partially cylindricalinner surface of the bars and teeth and engaging said inner surfacethroughout said longitudinal bar and adjacent portions of said teeth,said cutter bars of the inner cutter ter. minating inwardly from theends of said teeth in a shoulder extending substantially radially insaid bore, and said inner cutter having a fiat face extendinglongitudinally thereof from the base of said shoulder in spaced relationto the inner edges of said complemental bars and the ends of said teethto provide a longitudinal channel between said cutter members.

4. A dry shaving head comprising an outer cutter ineirlber having acurved shaving section, a longitudiiialhbar forming the central portionof said sectionfa plurality of blunt cutting teethprojectinglaterallyiin spaced" parallel relation from one side of saidlongitudinal bar toward one side of said section, said side of saidsection having portions thereof projectix'ig toward the ends of saidteeth and terminating in spaced relation thereto, said projectingportions from said one side and said teeth having flat outer surfaceslying in a plane extending in inclined relation to said side andintersecting said longitudinal bar, said longitudinal bar, teeth andsaid projecting portions having a continuous inner partially cylindricalsurface, and an inner cutter member having a plurality of spacedparallel transverse cutter bars formed with a partially cylindricalouter surface engaging said inner partially cylindrical surface forcutting cooperation between said cutter bars and said teeth inreciprocation of one of said members relative to the other, said `cutterbars terminating in spaced relation inwardly of the ends of said teethand said inner lcutter member having a longitudinal channel formedtherein at the ends of said cutter bars to space adjacent portions ofsaidY inner cutter member from the ends of said teeth and saidprojecting portions on said side.

5. A dry shaving head comprising an outer cutter member having a curvedshaving section, a continuous longitudinal center portion forming partof said section, a plurality of spaced cutting members integral atopposite ends with said center portion and one side 'portion of saidshaving section-respectively, a plurality of spaced parallel cuttingteeth extending from the opposite side of said center portion toward theother side portion of said shaving section and having ends terminatingin spaced relation to said other side portion of said shaving section,said teeth, cutting members and center 'portion having a. partiallycylindrical inner surface, and an inner cutter member having spacedcutter bars with the outer surfaces in partially cylindrical relationand engaging said partially cylindrical inner surface of said teeth,cutting members and center portion

